We all know that there were lots of changes between the Harry Potter books and movies. Here's a list of a few.
1. Getting away from Privet Drive in the first movie
originally they went 3 or 4 different place before they went to the island.
2. Leaving right after Hagrid arrives
In the books Hagrid and Harry spent the night at the island
3. You know what in vault you know which, nope
In the book Hagrid said the vault number
4.When Harry and Malfoy met
In the book they met in Diagon Alley not Hogwarts.
Sorry it was so short couldn't think of anything else.